[미국특허]
Component separations in polymerization
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B01J-019/24
B01D-003/06
B01D-053/14
C07C-007/11
C08F-110/02
C07C-009/06
C07C-011/04
출원번호
US-0426643
(2017-02-07)
등록번호
US-9790298
(2017-10-17)
발명자
/ 주소
Kufeld, Scott E.
Hottovy, John D.
Chang, Ai-fu
출원인 / 주소
Chevron Phillips Chemical Company, LP
대리인 / 주소
Conley Rose, P.C.
인용정보
피인용 횟수 :
0인용 특허 :
37
초록▼
A process for component separation in a polymer production system, comprising separating a polymerization product stream into a gas stream and a polymer stream, wherein the gas stream comprises ethane and unreacted ethylene, distilling the gas stream into a light hydrocarbon stream, wherein the ligh
A process for component separation in a polymer production system, comprising separating a polymerization product stream into a gas stream and a polymer stream, wherein the gas stream comprises ethane and unreacted ethylene, distilling the gas stream into a light hydrocarbon stream, wherein the light hydrocarbon stream comprises ethane and unreacted ethylene, contacting the light hydrocarbon stream with an absorption solvent system, wherein at least a portion of the unreacted ethylene from the light hydrocarbon stream is absorbed by the absorption solvent system, and recovering a waste gas stream from the absorption solvent system, wherein the waste gas stream comprises ethane, hydrogen, or combinations thereof.
대표청구항▼
1. A system comprising: a first polymerization reactor for polymerizing olefin monomers to yield a mid-polymerization product stream;a separator for separating the mid-polymerization product stream into a mid-gas stream and a mid-polymer stream;a second polymerization reactor for polymerizing the mi
1. A system comprising: a first polymerization reactor for polymerizing olefin monomers to yield a mid-polymerization product stream;a separator for separating the mid-polymerization product stream into a mid-gas stream and a mid-polymer stream;a second polymerization reactor for polymerizing the mid-polymer stream,wherein the mid-gas stream comprises ethane, unreacted ethylene, and hydrogen; andan absorption reactor for contacting the mid-gas stream with an absorption solvent system to absorb at least a portion of the unreacted ethylene from the mid-gas stream and to yield ethane in a waste gas stream. 2. The system of claim 1, wherein the separator comprises a flash tank for reducing a pressure of the mid-polymerization product stream so as to flash ethane, unreacted ethylene, hydrogen, or combinations thereof. 3. The system of claim 1, wherein the mid-polymerization product stream comprises hydrogen, ethane, unreacted ethylene, isobutane, and polyethylene; and wherein the mid-polymer stream comprises polyethylene and isobutane. 4. The system of claim 1, further comprising: a processing device to receive ethane from the absorption reactor and to convert ethane to ethylene,wherein the processing device is a cracker, a catalytic cracker, a converter, a dehydrogenator, or combinations thereof. 5. The system of claim 4, wherein ethylene is recycled from the processing device to one or more of the first polymerization reactor and the second polymerization reactor. 6. A system comprising: a first polymerization reactor for polymerizing olefin monomers to yield a mid-polymerization product stream;a separator for separating the mid-polymerization product stream into a mid-gas stream and a mid-polymer stream;a second polymerization reactor for polymerizing the mid-polymer stream; anda scavenger stream for introducing a scavenger prior to the second polymerization reactor,wherein the mid-gas stream comprises unreacted ethylene and ethane. 7. The system of claim 6, wherein the scavenger stream introduces the scavenger to the mid-polymerization product stream. 8. The system of claim 6, wherein the scavenger stream introduces the scavenger to the separator. 9. The system of claim 6, wherein the scavenger stream introduces the scavenger to the mid-polymer stream. 10. The system of claim 6, wherein the scavenger comprises a hydrogenation catalyst. 11. The system of claim 6, wherein the separator comprises a flash tank for reducing a pressure of the mid-polymerization product stream so as to flash unreacted ethylene and ethane. 12. The system of claim 6, wherein the mid-polymerization product stream comprises ethane, unreacted ethylene, isobutane, and polyethylene; and wherein the mid-polymer stream comprises the polyethylene and the isobutane. 13. A system comprising; a first polymerization reactor for polymerizing olefin monomers to yield a mid-polymerization product stream comprising hydrogen;a first separator for degassing at least a portion of the hydrogen from the mid-polymerization product stream to yield a hydrogen-reduced product stream;a second separator for separating the hydrogen-reduced product stream into a mid-gas stream and a mid-polymer stream;a second polymerization reactor for polymerizing the mid-polymer stream;wherein the mid-gas stream comprises unreacted ethylene and ethane; andan absorption reactor for contacting the mid-gas stream with an absorption solvent system to absorb at least a portion of the unreacted ethylene from the mid-gas stream and to yield ethane in a waste gas stream. 14. The system of claim 13, wherein the mid-polymerization product stream further comprises ethane, unreacted ethylene, isobutane, and polyethylene. 15. The system of claim 13, wherein the mid-polymer stream comprises polyethylene and isobutane. 16. The system of claim 13, wherein the second separator comprises a flash tank for reducing a pressure of the hydrogen-reduced stream so as to flash unreacted ethylene and ethane. 17. The system of claim 13, wherein an amount of hydrogen in the mid-gas stream comprises less than about 1 wt %. 18. The system of claim 13, further comprising: a processing device to receive ethane from the absorption reactor and to convert the ethane to ethylene,wherein the processing device is a cracker, a catalytic cracker, a converter, a dehydrogenator, or combinations thereof.
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